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<head>
    <meta charset="UTF-8">
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    <title>Document</title>
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<body>
    <script>
        const arr = [10, 20, 30];
        //every()当所有值满足条件时才会返回true
        console.log(arr.every(item => item >= 10));
        //some()只要有值满足条件时就会返回true
        console.log(arr.some(item => item <= 10));
    </script>
</body>

</html>